Heat exchanger tube



FIG. 1 is a perspective view of a heat exchanger tube;

FIG. 2 is a front view thereof, the opposite side being an identical image of the side shown herein;

FIG. 3 is a left side view thereof, the opposite side being an identical image of the side shown herein;

FIG. 4 is a top view thereof, the opposite side being an identical image of the side shown herein; and,

FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 2 thereof.

In the drawings, the broken lines depict unclaimed portions of the design only and form no part of the claimed design. 

CLAIM The ornamental design for a heat exchanger tube, as shown and described. 